This manual covers SX, MXC, XC, EXC, SMR, and SXS Racing models with 400cc and 450cc engine variants produced between 2000 and 2007. These high-performance motorcycles are renowned for their powerful engines, advanced suspension, and race-bred chassis design, reflecting Austrian heritage and consistent success in off-road racing disciplines. Engineered for demanding off-road and motocross use, these bikes offer a competitive edge through their robust construction and focus on rider control and agility. This comprehensive workshop service repair manual provides detailed information essential for the maintenance and repair of your motorcycle. It covers all major systems, including engine overhaul, transmission and clutch service, chassis components, electrical systems, fuel and brake systems, and bodywork. Within its pages, you will find step-by-step repair instructions, routine maintenance procedures, troubleshooting guides for common issues, and critical technical specifications such as torque values and fluid capacities, enabling owners and technicians to ensure optimal performance and longevity.